Perhaps you should try some spelling variations:
"hoc thiet java slippers" » "hoc think java slippers", "hoc thieu java slippers", "hoc thuyet java slippers", "hoc hien java slippers", "hoc thiet java slippery", "hoc thiet java grippers"
"using java java snippets" » "using data java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hoc thiet java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc thiet java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc thiet java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc thiet java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.